--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -1636,7 +1636,7 @@ static int bcm_enet_change_mtu(struct ne
 		return -EBUSY;
 
 	/* add ethernet header + vlan tag size */
-	actual_mtu += VLAN_ETH_HLEN;
+	actual_mtu += VLAN_ETH_HLEN + VLAN_HLEN;
 
 	/*
 	 * setup maximum size before we get overflow mark in
